Book/Report FZJ-2016-03379

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Anwendung von Zwei-Phasen-Diffusion zur Beschreibung der Freisetzung von Cäsium aus kugelförmigen HTR-Brennelementen



1976
Kernforschungsanlage Jülich, Verlag Jülich

Jülich : Kernforschungsanlage Jülich, Verlag, Berichte der Kernforschungsanlage Jülich 1323, 74 p. ()

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Report No.: Juel-1323

Abstract: For the theoretical prediction of fission product release from HTR-fuel elements the one-dimensional diffusion code SLIPPER has been developed, which describes the transport of fission products optionally by one- or two-phase diffusion. The mathematical-physical basis and general program-technical aspects are presented. The application of the code to irradiation experiments with spherical fuel elements in the Studsvik R2-reactor shows that the experimentally measured concentration profiles and fractional releases of the isotope Cesium 137 can be very well reproduced by two-phase diffusion. The used transport data for the fuel particles are in good agreement with reference values; on the other hand, the diffusion coefficients of matrix graphite are much smaller than those measured for unirradiated reference samples.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000 ; Retrocat)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2016-06-24, last modified 2021-01-29


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